Furthermore, in mathematical analysis, equations are commonly written with zero on one side.

A reader poll conducted by Physics World in 2004 named Euler's identity the "greatest equation ever", together with Maxwell's equations.

Constance Reid even claimed that Euler's identity was "the most famous formula in all mathematics".

Gauss is reported to have commented that if this formula was not immediately apparent to a student on being told it, the student would never be a first-class mathematician.[1]

After proving the identity in a lecture, Benjamin Peirce, a noted nineteenth centurymathematician and Harvard professor, said, "It is absolutely paradoxical; we cannot understand it, and we don't know what it means, but we have proved it, and therefore we know it must be the truth." [2]